package com.paotui.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class WebFilterConfig implements Filter{
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        //Filter.super.init(filterConfig);
    }
    @Override
    public void destroy() {
        //Filter.super.destroy();
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        //设置编码（两行都是）
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("application/json;charset=utf-8");
        //设置跨域
        response.setHeader("Access-Control-Allow-Origin", "http://localhost:8081");//前端运行的地址
        //放行
        filterChain.doFilter(request,response);
    }
}
